Well iv ben mssing around wiht my new 8KDA3J and newcastle 3000+ are these any good ?

[CandymanCan]

Im got a max of 2600mhz (not stable) using 1.7v on the stock cooler.

2550 or 2500mhz seems to be stable i havent tested yet. I got a max HTT speed of 280 but its wierd Windows boots @ 280HTT but the cpu is @ 1.2v and a multi of 5.

Can someone help with me this overclocking on the A64's. I want to reach 300HTT.

Also is a 3276/3276 memory benchmark on sandra @ 255HTT 212mhz 3-3-3-8-1T, good ? I cant lower the memory timmings cuss my Samsing seems to hate it. I really need some help here. Is thier some kind of bios i ca ndownload to get higher overclocks ?

More Info is here. http://www.ocforums.com/showthread.p...1&page=1&pp=30

[EPoX Tech]

In all of my testing it seems that regardless of memory type, the A64 controller is most happy when doing asynchronous work to be running 3-4-4-11-1T or 3-3-3-8-1T. Lower latencies that can be handled by the memory can't necessarily be handled by the memory controller when the heat is on.

[dod]

Originally Posted by EPoX Tech

In all of my testing it seems that regardless of memory type, the A64 controller is most happy when doing asynchronous work to be running 3-4-4-11-1T or 3-3-3-8-1T. Lower latencies that can be handled by the memory can't necessarily be handled by the memory controller when the heat is on.

Hmm, wonder if that would let me sneak past 320? Back in a minute

[EPoX Tech]

I did 316 (133mem max) with 3-4-4-11-1T with some good stability so I think you will.

[dod]

Originally Posted by EPoX Tech

I did 316 (133mem max) with 3-4-4-11-1T with some good stability so I think you will.

Not letting me in now, just getting stop errors Having said that I did try to boot at 3.2 GHz first time round

[dod]

Originally Posted by EPoX Tech

I did 316 (133mem max) with 3-4-4-11-1T with some good stability so I think you will.

Was that with the Nanya ram you were using? I'm not getting any stability over 290 at the moment, tried three different sets of ram too, just wondering if the cpu's objecting. MUST get the water cooling on again.

[CandymanCan]

SO should i try 3-4-4-11- 1t ? how come running a 310HTT and the emory @ 155MHZ @ 3-3-3-8-1t. I only get 2300/2300 in sisoft sandra.

I thought that Running Asynce doesnt hurt performance. With the 3-4-4-11-1t i got a max of 325HTT but my Sandra score was only 2400/2400 with 96% EFF

Btw i got 325HTT using the 4XHTT frequency, @ 1.7v for the chipset, its wierd if i try to lower the 3x which should be slower thus allowing higher overclock it gets unstable @ high HTT speeds

Here is a pic

http://residentevil33.freeservers.com/images/325htt.jpg

[gouda]

I would think using 2t would yield higher oc's and reduce performance. Many people were having trouble getting high oc's because their bios in other mobos did not allow for them to switch from 1t to 2t.

I have also never heard of the controler having any issues with tight timings. I have seen plenty of ocz eb at 3-2-2 at high speeds and bh-6/5 2-2-2 1:1 up to 300 fsb, but that was with very high vdim.

[CandymanCan]

No 2T on the CG revision cpu makes the Bandwidth Effincy drop by like 10-20% , 1t is the choice you should use.

[gouda]

In real world performance in some cases increased due to a large gain in oc stability. But you have to gain quite a bit to make up the difference, so I would assume in most cases 1t would be better.

[tetrahedron]

i have the J version too

the best OC i have got in performance wise is..

231x10 1.7v 4x HT chipcore 1.65v 2.5-3-3-7 1T 1:1 200Mhz

my specs

8KDA3J
Amd64 3200 Claw SH7-CG
2 @ 512MB Cosair XMS3200LLPT Twin-X

i have tried 133Mhz and 166 Mhz mem with all different timing setting, 2x and 3x HT and I can not get anything stable past 232x10 232x8 it just BSOD winxp.. maybe i should reinstall windows? I didnt when i installed to new mobo and cpu.. upgraded from a nforce2 chipset.. booted right up, just reinstalled drivers

[CandymanCan]

Try using 4xHTT frequency when going hgiher. I found that 3x and 2x or 1x are unstable even @ low HTT speeds.

[tetrahedron]

nope.. that highest i got with 4x HT

on 133 was 240x8
on 166 was 238x8
on 200 was 240x8


so i guess im gonna reinstall windows.. and try from there

[CandymanCan]

Is 1.75v for the chipset to much ? I have a fan n the heatsink.

[EPoX Tech]

Originally Posted by dod

Was that with the Nanya ram you were using? I'm not getting any stability over 290 at the moment, tried three different sets of ram too, just wondering if the cpu's objecting. MUST get the water cooling on again.

I'm using some Hynix ES mem at the moment which is part of a cost down DDR 1 excerise for 915 / 925 chipsets - rated at 533 cas 3 but very flaky indeed.

Best Memory for A64 is Samsung originals on TCCC or TCC4 steps - anything like Corasair, Geil, OCZ etc. is asking for trouble at High memory clocks - Sammy TCCC's will do 244 straight clock on A64 with 2.8v at 3-3-3-8-1T all day long on NF3 250Gb solutions at a much better cost - rather have 1Gb of Sammy than 512Mb of fancy heatspreadered stuff. Twinmos etc also are weak due to over zealous SPD for wafer quality - only Apacer rank higher with me but I can only get that in Taiwan usually.

[Oldjim]

Great results CandymanCan.
Did you notice the CPU and Northbridge temperatures you were getting.

[CandymanCan]

I dunno what the chipset temps were as this board doesnt read them.. AS for the cpu the temps got to 60c thats why i went down to 2400mhz for the time being until my waterblock comes.


Also i noticed that when i take the heatsinks off it rips the cpu outa the socket. People said this was normal but one of the pins in my cpu are slightly bent now.


Btw what are these on the motherboard ? I was fealing diff spots on the board to see where the hot spots were cuss every motherboard has them. And those 4 black things i have circled are very very hot so hot my finger cant stay on them. So i added some small sinks that i had on my Mosfets on my NF7-S.

http://residentevil33.freeservers.co...123-219-02.jpg

[Finetobe]

i have done some memory test on my rig.
Epox 8kda3+
Amd64 3400+ Newcastle
Ocz pc 4400 cas 2.5.4.4.8
all test is 1-1 on memory and 2.5.4.4.8 1T 2.95v 3xHT
with 512mb in dimm1 i can get 280 mhz fsb x 9 and 4300mb/s in sisoft sandra. (prime stabel)
with 1024 mb of memory in dimm1 and 2 i can get 268mhz fsb x 10 and 3990 mb/s in sisoft sandra.(prime stabel)
With 1024mb of memory in dimm 1 and 3 the system is not stabel enough to benc.
I need 9.5 on the multiplier to run the the system at 100% 280x9.5 that will be great.
if i use 6/5 (166)on the memory i can get 295 mhz fsb but only 3500 mb/s in sisoft sandra.
cpu/gpu/and chipset is on water cooling

sorry for my English.

[Aedan]

Originally Posted by CandymanCan

Btw what are these on the motherboard ? I was fealing diff spots on the board to see where the hot spots were cuss every motherboard has them.

Those are MOSFETs. They're regulating power to various parts. I'd guess that the two closest to the IDE connectors are supplying the chipset with it's power. Not sure what the ones at the back are supplying power to.

There's also another pair, presumably providing the necessary voltage for the memory next to the two capacitors in front of the RAM slots.

[CandymanCan]

Those didnt get hot so i wont bother with them, only the 4 in the pics got really hot